code: def test_comment_before_machine_line(self):
      self._test_comment(
          """\
              # comment
              machine foo.domain.com login bar password pass
              machine bar.domain.com login foo password pass
              """
      )
  
imports: import netrc, os, unittest, sys, textwrap
  from test.support import os_helper
label_desc: Use image node_id 16 for calling the NetrcTestCase obj's underlying member method code with example usage: obj.test_comment_before_machine_line() without return types